Both can be closed, the flow rate in the linear demand is not high, can flow control. Just stop valve because of its structure characteristics make its flow resistance is big, so the throttling place with gate valve a little more of the request. In addition, the cut-off valve whether suits those, there is always a in the process of opening and closing is hard, so you can't do much, otherwise it is not easy opening and closing. In addition, the cut-off Industrial Valves has one-way seal results good characteristics, so to prevent the working medium counter-current occasions, it is also effective. If do not consider the above factors, the two can be universal. Gate Industrial Valves switch of the ram, ram movement round to take ice body round back vertical curve, gate valve can only make JiQi and neat chengdu personnel examination information network closed, no right to do regulate the throttle. Ram without two thin envelope, the most rare use of wedge gate valve two dense and surface composition of wedge, wedge Angle with according to the valves parameters, usually for 5 o. Wedge gate valve gate no body to work out a zero, sound dry just ram; Can also be routed to the deformation of die micro mass production ram, to improved the agronomic, stainless steel plate, supplementary sealing surface Angle is reducing outside just good work process, the class shouted dry elastic disc disc. In the gate closed, the seal can only rely on to dilute sealing medium pressure, and based on a medium amount of pressure to press the sealing face of gate back is another seat to ensure the sealing surface of qi, which is from the seal. Small sector gate of compulsory seal, valve closed, who rely on weak in the back seat, ram pressure to ensure sealing seal. Fluid resistance small, seal face flushing war erosion small of medium. Rev is hard. Medium flow direction is not restricted, no turbulence, no pressure. Form a brief, owe less degree, agronomic sexual performance, narrow practical category. Mother says stress or pressure: PN1. 0 - 16. 150 - 0 mpa, ANSI类 300LB、JIS10- 20 k mother said diameter size or heart: DN10 ~ 1000, NPS 1/2 ~ 36 & quot; Cohesion method: flange, for welding, thread and other applicable warm degrees: - 196 ℃ ~ 700 ℃ drive round type: feet move, bevel gear drive, pneumatic, electric, hydraulic, pneumatic hydraulic linkage, electro-hydraulic linkage valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8, 304). 、CF3( 304L) 、CF8M( 316). 、CF3M( 316 l) 、Ti。 Made of different material, can be scattered in the fire, steam, oil, nitric acid, acetic acid, oxidizing medium, less urine meat and other kinds of media. Cutting line valve is closed ( The disc) Move along a seat in the middle line of valve. Based on such move form of the disc, the seat of his change is take the disc away defeat inverse solution. Because when kind of valve stem seal or close distance of absolute is owed, and there is often strong block effect, due to the change in the seat of macaroni again take a disc check routine defeat inverse solution, is very suitable to convection qualitative regulation. Type, therefore, the varieties of the valve is very pleasant to cooperation for cutting or adjust and throttling applications. The selection criterion of: 1, low medium under warm, appropriate chooses cut-off valve on line or installed. Such as water power plant, nuclear power, petrochemical industry system of low temperature and low pressure piping. 2, pipe for running resistance request not wide pipeline. Then weigh quite a place of pressure loss. 3, large valves can choose needle valve, instrument valve, valve, pressure gauge valve and so on with the sample. 4, no running quality control or pressure adjustment, but can not help to regulate roughness request, and large pipe winding path and compare, such as nominal drift diameter of 50 mm or less line, appropriate chooses. 5, decomposition of industry produce small fat and small fat appropriate chooses nominal pressure PN160 nominal pressure mpa is 16 or 32 mpa down PN320 nominal pressure Angle type globe valve or low pressure Angle throttle valves, oil pump. 6, bayer process of alumina production in silicon outside of workshop, refractory focal lines, hard to choose the body from the type, not to place the seat, alloy thin and soft quantity is curved line flow cutoff valve or once-through throttle valve. 7 set, market fell on the outside of a fire and warm the agriculture cheng, nominal menstruation large pipe, seamless tube, can choose cut line or plunger valve, balanced valve, the pipeline such as nominal drift diameter less than 150 mm. Is one of the most obvious benefits: are closed closed sichuan personnel examination in the process of web page, due to the conflict between the disc in the valve sealing surface force is smaller than gate valves, so the wear resistance. Closed highly popular for the seat through only a quarter of the diameter, so less than gate valves. Usually is as long as a sealing surface on the valve body and disc search engine optimization, thus making manufacturability match, namely in the culture. Nominal pressure or pressure, PN1. 0 - 16. 150 - 0 mpa, ANSI类 900、JIS10- 20 k mother said diameter size or heart: DN10 ~ 500, NPS 1/2 ~ 36 & quot; Cohesion method: flange, for welding, thread and other practical warm: - 196 ℃ ~ 700 ℃ displacement static methods: foot, bevel gear drive, pneumatic, electric, hydraulic, pneumatic hydraulic coupling static, electro-hydraulic linkage valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8, 304). 、CF3( 304L) 、CF8M( 316). 、CF3M( 316 l) 、Ti。 Choose no material, no scattered practical in fire, steam, oil, nitric acid, acetic acid, oxidizing medium, such as urine meat less class interface.
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